package dao.impl;

import dao.DeptDao;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import pojo.Dept;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

public class DeptDaoImpl implements DeptDao {
    @Override
    public List<Dept> findAll() {
        SqlSession sqlSession = null;
        //引入mybatis配置文件
        String resource = "mybatis-config.xml";
        try {
            //加载配置文件
            InputStream inputStream = Resources.getResourceAsStream(resource);

            //创建会话工厂
            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
            //创建会话
            sqlSession  = sqlSessionFactory.openSession();
            //执行查询
            List<Dept> depts = sqlSession.getMapper(DeptDao.class).findAll();
            return depts;
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            sqlSession.close();
        }
    }
}